php8_init_with_class_obj

class User
{
    public function __construct(
        private int $id = 0,
        private string $name = ''
    )
    {
    }

    public static function getInstance($id, $name) : self
    {
        return new self($id, $name);
    }
    public function getUserName() : string
    {
        return $this->name;
    }
}

class SomeClass
{
    private User $user;
    public function __construct(
        private User $user = User::getInstance($id, $name)
    )
    {
        //$this->user = $user::getInstance()
    }
    public function getUserName(): string
    {
        return $this->user->getUserName();
    }
}
$user = new User(1, 'John');
$cls = new SomeClass($user);
echo $cls->getId();